At 10.54 hrs UK time, the forum header page (where the latest six posts are shown) was in Chinese (?) with English 'sub-titles' for various Universities. This also appeared in some threads.
The title was "办科罗拉多波尔得分校大学毕业证|买美国毕业证Q/微993398773原版CU-Boulder毕业证| 成绩单|教育部学历认证|办美国毕业证University of Colorado Boulder". You can find as many as 15,600 articles with the key words "办科罗拉多波尔得分校大学毕业证".
It's college diploma business.
Thanks Wojtek, and no problem - it didn't have any adverse effect on using the the forum.
Thank you Shinpachi, and apologies - I wasn't sure if it was Chinese or Japanese.